Swaging tool



May 28, 1968 G. WHUTH 3,385,087

SWAGING TOOL Filed Feb. 18, 1966 57 5559@ ZZ z/ United States Patent O 3,385,087 SWAGING TOUL Gerald W. Huth, Burbank, Calif., assignor to Huth Manufacturing Corporation, Burbank, Calif., a corporation of California Filed Feb. 18, 1966, Ser. No. 528,454 8 Claims. (Cl. 72-36) This invention relates toan improved swaging tool and more particularly to an adjustable swaging tool for expanding tubing and the like.

Various apparatus have been provided for forming tubing, such as automobile exhaust and tail pipes, including devices which are used for expanding the diameter thereof. Many of these devices are relatively inexible in thei-r capability, requiring that parts or components thereof must be changed in order to provide the desired degree of tubing expansion, or are relatively inaccurate in operation.

Accordingly, it is an object of the present invention to provide 'an adjustable tool lfor expanding tubing.

It is an additional object of this invention to provide an adjustable swaging tool.

It is fa further object of this invention to provide a swaging tool which may be readily and conveniently adjusted for accurately setting a desired degree of tube expansion.

Other objects .and features of this invention will becorne more apparent through a detailed consideration of the following description taken in conjunction with the drawing in which:

FIGURE 1 is a top view of a swaging tool constructed in accordance with the teachings of the present invent1on;

FIGURE 2 is a side cross sectional view of a portion of the tool shown in FIGURE 1;

FIGURE 3 is a cross sectional view of 'a portion of the tool shown in FIGURE 2 in a retracted position;

FIGURE 4 is a cross sectional view of the tool shown in FIGURE 2 in an expanded position;

FIGURE 5 is an end View, partially in section, taken along a line 5-5 of FIGURE 4;

FIGURE 6 is a cross sectional View taken along a line 6-6 of FIGURE 4; and

FIGURE 7 is an enlarged View of a portion of the tool shown in FIGURE l.

Referring now to the drawing, a hydraulic ram 10` includes `a cylinder 11 having ttings 12 and 13 connected to the respective ends thereof. The fittings 12 and 13 are adapted to be connected to hydraulic fluid lines, Whereby pressure may be applied through the fitting 12 to a piston (not shown) within the cylinder 11 to cause operation of the rarn. The tool shown in the drawing may be used with, and operated by the hydraulic system of, the tube bending apparatus described in U.S. patent application Ser. No. 528,936, filed Feb. 21, 1966 entitled Tubing Bender. Additionally, the ram 10 may serve as the source of mechanical power for the apparatus described in U.S. patent application Ser. No. 528,938, filed Feb. 21, 1966, entitled Swaging Attachment.

The ram 10 is mounted on a bracket 15 by means of bolts, or the like. The ram includes a piston rod :17 (note FIGURES 2 and 4) which is driven by the piston within the cylinder 11. An expander 18 has an enlarged cylindrical end 19 which is threaded onto the end of the piston rod 17 and is moved by the piston rod. The end 19 of the expander 18 and the external end of the piston rod 17 slide within a Ibore 20 in the body 21 of the tool. The body 21 is secured to the bracket 15 at one end thereof, with the other end 22 thereof being threaded to receive an internally threaded adjustor sleeve 23. The

exterior of the sleeve 23 may be knurled to facilitate rotation thereof by hand. A lock-nut 24 also is threaded onto the end 22 of the body 21 for locking the position of the sleeve 23. For reasons which will become apparent subsequently, a portion of threads on the end 22 of the body 21 are milled away and a scale 26 (note FIGURE 7) is provided thereon.

The expander 18 includes a neck 30 extending outwardly from the en-d 19 and coaxial therewith to a frustoconical portion 31 having faces 32 providing essentially a hexagonal cross section to the portion 31 (note FIG- URE 6). The extreme end 33 of the expander 18 is tapered thereby facilitating the positioning of tubing 34 onto the end of the tool.

A jaw '36 includes a plurality of jaw segments 37 arranged about the tapered portion 31 of the expander 18. A groove 38 is provided `about the periphery of the jaw 36 .and an O-ring 39, which may be formed of a resilient material such .as rubber, is positioned therein to maintain the jaw segments 37 in place. The jaw 36 further includes a flange 40 forming a shoulder against which the end of the tubing 34 abuts, and having a peripheral groove 41 therein retaining a second resilient O-ring 42 which also aids in maintaining the jaw segments 37 in position.

Each of the jaw segments 37 has an inclined surface 44 which mates with one of the faces 32 of the expander 18. Thus, as the expander 18 is retracted (moved to the right in the figures by uid pressure applied to the fitting 12) by the force of the ram 10, the jaw segments 37 of the jaw 36 expand as indicated by dashed lines 45 in FIGURE 6 to expand an end 46 of the tubing 34. FIG- URE 2 illustrates the periphery of the jaw 36 just engaging the interior of the tubing 34; whereas FIGURE 3 shows the jaw 36 in an expanded position whereby the end 46 of the tubing 34 has been expanded. After the tubing 34 is expanded, uid under pressure is applied to the ram 10 through the fitting 13 to extend the expander 18 thereby allowing the jaw 36 to retract to its normal position.

The adjustor sleeve 23 may be screwed back and forth on the en-d 22 of the body 21 to select a desired degree of jaw, and thus tubing, expansion. With the expander 18 having a given length of movement when it is retracted by the ram 10, it will lbe apparent that the particular position of the sleeve 23 will thereby determine the degree of expansion of the jaw 36. Thus, if the sleeve 23 is screwed substantially all of the way onto the 'body 21 as shown in FIGURE 2, the expansion of the tubing 34 will be slight; whereas if the sleeve 23 is screwed further out on the end 22 of the body 21 as shown in FIGURE 4, the degree of jaw expansion will be greater thereby providing greater expansion of the tubing 34. The scale 26 shown in FIGURE 7 provides an accurate and handy visual indication of the necessary setting of the sleeve 23 to provide the desired degree of tubing expansion.

It Will be understood that although an exemplary embodiment of the present invention has been disclosed and discussed, other configurations, structural arrangements and applications are possible and that the embodiment disclosed may be subjected to various changes, modifications, and substitutions without necessarily departing from the spirit of the invention.

What is claimed is:

1. A swaging tool for expanding tubing, and the like, comprising jaw means having a tapered interior, said jaw means being formed of a plurality of movable segments, retainer means coupled with said jaw meansfor retaining said jaw means normally in a closed position, expander means adapted to be moved by hydraulic ram means,

said expander means being mounted coaxially within said jaw means and including a tapered portion having a plurality of faces thereon equal in number to the number of said movable segments of said jaw means, and

adjustor means coupled with said jaw means for adjusting the longitudinal position of said jaw means with respect to said expander means to thereby adjust the degree of expansion of said jaw means upon movement of said expander means.

2. A swaging tool for expanding tubing, and the like,

comprising a body adapted to be coupled with hydraulic ram means,

expander means mounted within said body and having a portion extending from said body, said expander means being adapted to be moved longitudinally by `said hydraulic ram means,

said portion of said expander means extending from said body including a tapered portion having a plurality of faces thereon,

jaw means mounted coaxially over a portion of said expander means and having a tapered interior for substantially mating with the tapered portion of said expander means, said jaw means being formed of a plurality of movable segments and being expandable by said expander means upon longitudinal movement thereof,

retainer means coupled with said jaw means for retaining said jaw means normally in a closed position, and

adjustor means movably mounted on said body for engaging said jaw means and adjusting the longitudinal position thereof with respect to said expander means.

3. A swaging tool for expanding tubing, and the like,

comprising a body adapted to be coupled with hydraulic ram f means,

expander means mounted within said body and having a portion extending from said body, said expander means being adapted to be moved longitudinally by said hydraulic ram means,

said portion of said expander means extending from said body including a tapered portion having a plurality of faces thereon,

jaw means mounted coaxially over a portion of said expander means and having a tapered interior for substantially mating with the tapered portion of said expander means, said jaw means being formed of a plurality of movable segments equal in number to the number of faces on said expander means, said jaw means being expandable upon longitudinal movement of said expander means,

retainer means coupled with said jaw means for retaining said jaw means normally in a closed position, and

adjustor means movably mounted on said body for engaging said jaw means and adjusting the longitudinal position thereof with respect to said expander means to thereby adjust the degree of expansion of said jaw means upon longitudinal movement of said expander means.

4. A swaging tool for expanding tubing, and the like,

comprising a body adapted to be coupled with hydraulic ram means,

said body including a scale thereon,

expander means mounted within said body and having a portion extending from said body, said expander means being adapted to be moved longitudinally by said hydraulic ram means,

said portion of said expander means extending from said body including a tapered portion,

jaw means mounted coaxially over a portion of said expander means and having an interior tapered substantially the same as the tapered portion of said expander means, said jaw means being formed of a plurality of movable segments and being expandable by said expander means upon longitudinal movement thereof, and adjustor means movably mounted on said body for engaging said jaw means and adjusting the longitudinal position thereof with respect to said expander means, said adjustor means exposing said scale to thereby indicate the degree of adjustment of said jaw means. 5. A swaging tool for expanding tubing, and the like, 10 comprising a body adapted to be coupled with hydraulic ram means, said body including a scale thereon, expander means mounted within said body and having a portion extending from said body, said expander means being adapted to be moved longitudinally by said hydraulic ram means, said portion of said expander means extending from said body including a tapered ,portion having a plurality of faces thereon, jaw means mounted coaxially over a portion of said expander means and having a tapered interior for substantially mating with the tapered portion of said expander means, said jaw means being formed of -a plurality of movable segments and being expandable by said expander means upon longitudinal movement thereof, and adjustor means movably mounted on said body for engaging said jaw means and ladjusting the longitudinal position thereof with respect to said expander means, said adjustor means exposing said scale to thereby indicate the degree of adjustment of said jaw means. 6. A swaging tool for expanding tubing, and the like, comprising a body adapted to be coupled with hydraulic ram means, said body including a scale thereon, expander ymeans mounted within said body and having a portion extending from said body, said expander means being adapted to be moved longitudinally by said hydraulic ram means, said portion of said expander means extending from said body including a tapered portion, jaw means mounted coaxially over a portion of said expander means and having an interior tapered substantially the same as said tapered portion of said expander means, said jaw lmeans being formed of a plurality of movable segments and being expandable by said expander means upon longitudinal movement thereof, and adjustor means including a sleeve threaded onto said body, an end of said sleeve engaging an end of said jaw means for adjusting the longitudinal position of said jaw means with respect to said expander means, said sleeve exposing said scale to thereby indicate the degree of adjustment of said jaw means. 7. A swaging tool for expanding tubing, and the like, comprising a body, hydraulic ram means coupled with said body, expander means mounted within said body and coupled to said hydraulic ram means for movement thereby, said expander means having a tapered portion extending from said body, jaw means mounted over a portion of said expander means and having a tapered interior for substantially mating with the tapered portion of said expander means, said jaw means being formed of a plurality of radially movable segments and being expandable by said tapered portion of said expander means upon predetermined movement thereof by said hydraulic ram means, and adjustor means movably mounted on said body for engaging said jaw means and adjusting the longitudinal position thereof with respect to said `expander means to thereby adjust the degree of expansion of said jaw means.

5 6 8. A swaging tool for expanding tubing, and the like, portion of said expander Imeans to thereby adjust the comprising degree of expansion of said jaw means upon longia body adapted to be coupled with hydraulic ram tudinal movement of said expander means.

means, expander means mounted within said body and adapted 5 References Cited to be moved longitudinally by said hydraulic ram UNITED STATES PATENTS means, said expander means having a tapered portion 1,089,170 3/1914 Wiedeke 72-36 .extendmg frm-sa1d bodY 1,346,957 7/1920 Hansen 72-393 said tapered portion of said expander means having 1 625131 4/1927 Millar ,l2-393 a plufahty of faces thireon 10 2,444,601 7/i94s Hansen n 72-393 ]aw means mounted coaxially over a portion of said ex- 2319216 5/1943 D 1d 72 393 pander means, said jaw means including a plurality 2524 164 10/1950 De/ "t-l- 72-393 of radially movable segments having tapered faces 2 672 17 5 3/1954 Hu eyde a' 72-393 substantially mating with the faces on the tapered 2943667 7/1960 Emfvar l 72* portion of said expander means, said jaw means be- 15 wmg et a *393 ing expandable by said tapered portion of said ex- FOREIGN PATENTS pander means upon longitudinal movement thereof 567 948 3/1924 France by said hydraulic ram means, 619672 5/1961 Canad' retainer means coupled with said jaw means for retain- 734367 7/1955 Great Britain ing said jaw means normally in a closed position, and 20 adiustomeani @Ovaby moute ,01; Saitdh bfldy ftOf CHARLES W. LANHAM, Primary Examiner.

engaging sai Jaw means an a jusing e ongiul dinal position thereof with respect to the tapered A- RUDERMAN: Ass'smm Examine- 

4. A SWAGING TOOL FOR EXPANDING TUBING, AND THE LIKE, COMPRISING A BODY ADAPTED TO BE COUPLED WITH HYDRAULIC RAM MEANS, SAID BODY INCLUDING A SCALE THEREON, EXPANDER MEANS MOUNTED WITHIN SAID BODY AND HAVING A PORTION EXTENDING FROM SAID BODY, SAID EXPANDER MEANS BEING ADAPTED TO BE MOVED LONGITUDINALLY BY SAID HYDRAULIC RAM MEANS, SAID PORTION OF SAID EXPANDER MEANS EXTENDING FROM SAID BODY INCLUDING A TAPERED PORTION, JAW MEANS MOUNTED COAXIALLY OVER A PORTION OF SAID EXPANDER MEANS AND HAVING AN INTERIOR TAPERED SUBSTANTIALLY THE SAME AS THE TAPERED PORTION OF SAID EXPANDER MEANS, SAID JAW MEANS BEING FORMED OF A PLURALITY OF MOVABLE SEGMENTS AND BEING EXPANDABLE BY SAID EXPANDER MEANS UPON LONGITUDINAL MOVEMENT THEREOF, AND ADJUSTOR MEANS MOVABLY MOUNTED ON SAID BODY FOR ENGAGING SAID JAW MEANS AND ADJUSTING THE LONGITUDINAL POSITION THEREOF WITH RESPECT TO SAID EXPANDER MEANS, SAID ADJUSTOR MEANS EXPOSING SAID SCALE TO THEREBY INDICATE THE DEGREE OF ADJUSTMENT OF SAID JAW MEANS. 